Valves & Valvetrain Parts
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- Dura-Bond®Spring RetainerSpring Retainer by Dura-Bond®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$9.18 - $16.24
- QualCast®Engine Push RodEngine Push Rod by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$3.11 - $3.41
- QualCast®Engine Valve LifterEngine Valve Lifter by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$6.35 - $14.73
- QualCast®Engine Valve Seat InsertEngine Valve Seat Insert by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$4.65 - $6.22
- QualCast®High Performance Valve SpringHigh Performance Valve Spring by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$6.36 - $10.48
- QualCast®High Performance Valve Spring RetainerHigh Performance Valve Spring Retainer by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$2.22 - $9.81
- QualCast®High Performance Valve Stem Oil SealHigh Performance Valve Stem Oil Seal by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$1.44
- QualCast®Performance Valve Spring Retainer KeeperPerformance Valve Spring Retainer Keeper by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$1.26 - $1.51
- QualCast®Push RodPush Rod by QualCast®. QualCast Push Rods are being stocked in nitrided finish for improved surface finish and rust preventative. Lengths are stamped on the push rod.Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$2.67 - $4.93
- QualCast®Q Series Valve Seat InsertQ Series Valve Seat Insert by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$3.00 - $7.28
- QualCast®Rocker ArmRocker Arm by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a hassle...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$6.66 - $12.60
- QualCast®Valve LifterValve Lifter by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$5.88 - $141.08
- QualCast®Valve Seat InsertValve Seat Insert by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$3.59 - $15.46
- QualCast®Valve SpringValve Spring by QualCast®. QualCast springs are made from super clean carbon steel wire (non-metallic particles can reduce steel strength). QualCast also use chrome, chrome vanadium, or AS-25, depending on the application.Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$2.04 - $8.38
- QualCast®Valve Stem Oil SealValve Stem Oil Seal by QualCast®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$0.88 - $3.74
- DIY Solutions®Engine Rocker ArmEngine Rocker Arm by DIY Solutions®. If you're seeking to get your steel stallion back to its tip-top condition, then this top-notch replacement solution is what you should definitely look out for. When it comes to quality, reliability...Designed to help restore your vehicle to its former gloryQuick replacement to let you enjoy an awesome ride again$28.51 - $638.51$38.71 - $679.27Save up to 9%
- DIY Solutions®Engine Rocker Arm BridgeEngine Rocker Arm Bridge by DIY Solutions®.Developed to comply with rigorous quality standardsExceptional quality at a budget-friendly price$19.02 - $163.31$21.37 - $179.47Save up to 11%
- DIY Solutions®Engine Valve LifterEngine Valve Lifter by DIY Solutions®. If you're seeking to get your steel stallion back to its tip-top condition, then this top-notch replacement solution is what you should definitely look out for. When it comes to quality,...Designed to help restore your vehicle to its former gloryQuick replacement to let you enjoy an awesome ride again$21.37 - $133.57
- Elwis®Valve Stem Oil SealValve Stem Oil Seal by Elwis®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$1.01 - $4.79
- Eurospare®Engine Push RodEngine Push Rod by Eurospare®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$4.96
- Eurospare®Rocker ArmRocker Arm by Eurospare®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.63 - $11.43
- Eurospare®Rocker Arm ShaftRocker Arm Shaft by Eurospare®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$24.98 - $71.26
- Eurospare®Valve Stem SealValve Stem Seal by Eurospare®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$0.59 - $1.41
- Nippon Reinz®Valve Stem Oil SealValve Stem Oil Seal by Nippon Reinz®. Increasing torque and performance with decreasing consumption and emissions. The development goals in engine construction determine the requirements of modern gasket systems. As a leader in...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$2.69 - $4.22
- AJUSA®Hydraulic LifterHydraulic Lifter by AJUSA®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Direct OEM replacement for a proper fitEnsure reliable sealing performance$15.61 - $38.02
- AJUSA®Rocker ArmRocker Arm by AJUSA®. One the most critical components of any engine is the head gasket — which seals the cylinder head to the engine block. AJUSA offers excellent coverage for European and Asian vehicles in the U.S. and Canadian...Direct OEM replacement for a proper fitEnsure reliable sealing performance$42.34 - $112.73
- AJUSA®Valve Stem SealValve Stem Seal by AJUSA®. Valve cover gaskets and sets are used to seal the valve cover to the cylinder head. Some vehicles require additional components such as spark plug tube seals or small grommets more commonly seen on modern...Direct OEM replacement for a proper fitEnsure reliable sealing performance$0.70 - $2.07
- Cometic Gasket®Valve Stem SealValve Stem Seal by Cometic Gasket®. Designed utilizing the latest technology, this product by Cometic Gasket features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to...Expertly crafted from premium materialsDesigned to match rigorous quality standards$1.92 - $70.61
- Corteco®Valve Stem Oil SealValve Stem Oil Seal by Corteco®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$0.49 - $45.67
- Livernois Motorsports®Powerstorm™ Valve Spring KitPowerstorm™ Valve Spring Kit by Livernois Motorsports®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to...High quality at an affordable priceExpertly made from premium materials$9.99 - $989.99
Valves allow gases to flow in and out of the cylinders, and seal the combustion chambers so compression can develop. They open and close in response to the lobes on the camshaft via the valvetrain. The air/fuel mixture flows in when the intake valve opens, and the spent exhaust gases flow out when the exhaust valve opens after the power stroke. Every engine has at least one intake and exhaust valve, while many have a pair of each.
Valvetrains differ according to camshaft location. On Over Head Valve engines the cam is in the cylinder block. On Over Head Cam engines one or two cams are on the cylinder head. On OHV engines lifters ride on the camshaft lobes, pushrods transfer motion up to the cylinder head, and rocker arms pivot on shafts or studs actuating the valves. OHC valvetrains may have pivoting rocker type followers and lash adjusters or buckets between the cam and valves.
Valvetrain problems are often caused by excessive clearance. As cam lobes, lifters/followers, pushrods, and rocker arms wear, clearance is increased. Once clearance starts to increase, the pounding experienced by each component becomes greater as the lash opens and is taken up during valve operation. This can result in bent pushrods and broken rocker arms. The most common valve failure is overheating, especially on exhaust valves, which causes the valve to “burn” and distort and/or crack.
Miles and engine heat can also take their toll on valve springs. The valve springs must have enough pressure to keep the valves closed and maintain valve lash. Seat pressure is usually 70-90 lbs. on a stock engine with open pressure at 200 lbs. or more. Weak valve springs can’t exert the proper amount of pressure, which can cause misfire and loss of power as engine speed increases, resulting in “valve float”, where the valves fail to close. In extreme cases valve float can allow the valves to contact the pistons on some engines, bending or breaking the valves and cracking or breaking the pistons.
Performance valvetrain components must be much stronger to function at high RPMs and overcome stiff valve spring pressure to open larger valves. Higher valve spring pressure is needed to prevent valve float at high RPM. Performance rocker arms and valve spring retainers are made of lighter materials to enable the engine to rev easier and achieve higher RPM, and components like roller lifters and roller rockers reduce power-robbing friction. Most performance pushrods are made of strong chrome moly steel, and larger diameter pushrods are available for some applications. No matter whether you’re looking for a stock replacement or a performance unit, we are your one-stop shop.
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